Piston-head.



v P. P. ROESGH.

' PISTON HEAD.

APPLICATION FILED NOV. 29, 1910.

I T EL M J s .v m. V A m. m v F ATTORNEYS To all whom it mil/y concern:

FRANK PIENIE IROTIEISCH, OF DOUGLAS, ARIZONA TERRITORY.

PISTON-HEAD.

Specification of Letters Patent.

Patented Feb. 21, 1911.

Application filed November 29, 1910. Serial No. 594,640.

Be it known that L'FKANK P. RonsoH, a

' citizen of the United States, and a resident of Douglas, in the countyof Cochise and ,Territory of Arizona, have invented certain new anduseful Improvements .in Piston-Heads, of which the following is aspecification.

This invention is an improvement in piston heads and has for an objectto provide a novel construction of what isknown as the bull-ring byforming the said bull-ring in two segmental sections fitted togetheraround the body of the piston and receiving the snap rings by which thepacking of the piston within the cylinder is secured; and the inventionconsists in certain novel constructions and combinations of parts aswill be hereinafter described and claimed.

In the drawing Figure l is a side view of a piston embodying myinvention. Fig. 2 is an end view thereof. Fig. 3 is a cross section onabout line 3-3 of Fig. 2. Fig. 4 is a detail perspective viewillustrating the two segmental sections of the so-called bull-ring.

In the construction shown, the piston head has a body A which may be ofsteel suitably secured to the piston rod B and the said body A isprovided with a circumferential groove G in which is fitted thesegmental bull-ring sections D, as shown. These'bullring sections maybeof cast iron and may be easily renewed when worn, the body C and ringsections D being assembled in a simple manner and secured when in use,without the necessity of bolts or the like, so that a practicallyboltless piston head is provided.

One of the walls of the groove C is notched at C and the bull-ringsection D is correspondingly notched at D the notches C and D receivinga dowel pin E by which the bull-ring will be held from turning upon thebody A.

The sections D are formed at their meeting ends toprovide a lap joint atF and these sections D are provided in their outer sides withcircumferentially extending grooves D. which receive the packingvringsG. These packing rings G may be of ordinary construction. The bull-ringsections D are provided at their opposite edges with flanges orextensions D which overlap the side walls of thegroove C, as best shownin Fig. 3 of the drawin i It will be noticed roin the foregoing and theaccompanying drawing, that the important feature of my invention is thenovel form of the so-called bull-ring, that is to say, made in segmentalsections so that the sections may be applied to and removed from thebody of the piston, the latter having a groove with integral side wallsor flanges adapted to receive the sections of the bull-ring, thebull-ring distinguishing from the ordinary bull-ring in being made insegmental sections and not a solid unbroken ring, as usual. By thedescribed construction I avoid the necessity of bolts, follower plates,etc. and render it convenient .to re new the bull-ring when it becomesworn and retain the piston head proper without the necessity of removingthe piston head from the piston rod.

I claim:

1. The improvement in pistons herein described, comprising the pistonbody having a circumferential rim groove with the walls P thereofintegral with each other and provided in the inner face of one of thewalls of the said groove with a notch, a bull-ring made in separatesegmental sections with lap joints at their ends and fitting in saidgroove, one of said sections being provided with a notch coinciding withthat in the piston body, the bull-ring sections having edge flangesoverlapping the walls of the groove in the piston body and the saidsections being provided in their outer sides with circumferentiallyextending grooves, packing rin in the said grooves .anda pin in thecoinciding notches of the piston body and bullring sections,substantially as set forth.

2. A piston head comprising a one piece solid or integral body portionhaving a circumferential rim groove, segmental bull- .ring sectionsfitting in. said groove and packing carried by said sections,substantially as set forth.

3. A piston comprising a one piece solid or integral body portion havinga circumferential rim groove and a bull-ring fitting in said groove andcomposed of separate segmental sections, substantially as set forth.

4. A boltless piston head having a one piece solid or integral bodyportion, packing, and a bull-ring carrying the packing and made inseparate segmental sections, substantially as set forth.'

5. A piston head comprising a one piece solid or integral body portionhaving a circumfei'ential rim groove, a bull-ring fitting in said ooveand composed of separate segmenta sections having lap joints at theirmeeting ends and circur'nferentially extending grooves in their outerfaces and packing rings-in said grooves of the sections, substantiallyas set forth.

5 v 6. The improved piston head herein described, comprising a bodyhaving a circumferential rim groove, a bull ring made in separatesegmental sections with lap joints at their ends and fitting in the ooveof the .10 body, said segmental sections being provided i withcircumferential grooves for packing grooves and packing rings in thegrooves of said sections and overlapping the joints between the ends ofsaid sections, substantially as set forth.

FRANK PIENIE ROESCH.

Witnesses? W. W. LYEN,

' E. L. OARLET0N.-

